22
FIGURE 15-2
15.4.3.3. If the tank is between empty and 1/4 full, set the
monitoring-fluid level at about 1-1 1/2 inches below the midpoint
of the two points.
15.4.3.4. If the product level is between 1/4 and 1/2 full, set the
monitoring-fluid level to the midpoint of the two points.
15.4.3.5. If the product level is between 1/2 full and full, set the
monitoring-fluid level to about 1-1 1/2 inches above the midpoint
of the two points.
15.4.4. TRUCHEK
®
15.4.4.1. If a TRUCHEK
®
test is required after installation, follow
the procedures in the Xerxes TRUCHEK
®
brochure.
15.4.4.2. After this test, reset the monitoring-fluid level to a
position based on the product level.
(See SECTION 15.4.2. and
SECTION 15.4.3.)
16. INSTALLING ATTACHED COLLAR RISERS (ACR)
16.1. GENERAL
16.1.1. The ACR is a termination point for secondary piping
systems. It is designed to be monitored continuously for leaks
using electronic sensors. Consult federal, state and local codes
and regulations to ensure proper monitoring compliance.
Failure to follow these instructions may cause water-seal
failure, or minor or moderate injury.
• Always wear gloves when handling ACR components.
• Always wear eye protection when grinding, cutting and
attaching the sump unit.
• Read and follow all safety and application instructions on
adhesive/sealant packaging.
• Failure to follow this caution may result in minor or
moderate injury.
T
T
ent Reservoir/
Standpipe
op Slab
(by others)
Street Box and Electrical
Hookup
(by others)
Standpipe
(by others)
Sensor Cable
Reservoir
Sensor
Monitoring-Fluid Level
ank Rib
(cut away for
sensor placement)
V
15.4.1.5. If monitoring fluid is not in the reservoir, call the UST
coordinator at the Xerxes plant nearest you.
15.4.1.6. If a tank is sloped, the reservoir should be at the high end.
15.4.1.7. In a tank with the interstice filled with monitoring fluid,
Xerxes recommends using a nonmetalic standpipe in the reservoir.
15.4.1.8. The monitoring-fluid level may fluctuate during shipping
and may not be at the 3-inch mark. Do not add monitoring fluid until
after tank burial is completed and the monitoring system is set up.
15.4.1.9. The monitoring-fluid level in the reservoir will rise naturally
under various conditions:
• preinstallation air test,
• rise in groundwater level,
• backfill compaction,
• product loading,
• product temperature variation.
15.4.1.10. Check and record the monitoring-fluid level during the
installation process.
(See Tank Installation Checklist.)
15.4.1.11. Any monitoring-fluid leaks will be detected during the
preinstallation air test.
(See SECTION 3.)
15.4.2. SETTING THE LEVEL OF THE MONITORING FLUID
15.4.2.1. After backfilling and placement of top slab is
completed, check the level of the monitoring fluid in the
reservoir. (
See Section 15.4.3.
if using an electronic monitoring
system.)
15.4.2.2. The monitoring fluid should be set to a depth of 7" in
the reservoir. Add or remove monitoring fluid to reach this depth.
15.4.2.3. The level of the monitoring fluid may fluctuate due to
such things as:
• groundwater fluctuation,
• tank filling and emptying,
• product temperature variation.
15.4.3. PROBE INSTALLATION
15.4.3.1. If the tank contains product, stick the tank and set the
monitoring-fluid level based on the product level.
(See Points
15.4.3.3., 15.4.3.4. and 15.4.3.5.)
15.4.3.2. The sensor must remain in contact with the tank top at
all times. Do not raise the sensor off the tank to meet the
monitoring-fluid level. Add or remove monitoring fluid to change
the level on the sensor.
(See FIGURE 15-2.)
